Some eyeglasses niches.

cheap eyeglasses
$1.18 – $1.59 1 – 3 14 – 17 $20 – $30
cheap eyewear
$1.40 – $1.83 1 – 3 3 $4 – $7
cheap glasses
$1.02 – $1.54 1 – 3 148 – 187 $160 – $290
cheap prescription glasses
$1.29 – $1.65 1 – 3 12 – 15 $20 – $30
discount eyeglasses
$1.07 – $1.37 1 – 3 11 – 14 $20
prescription glasses
$1.19 – $1.66 1 – 3 101 – 127 $130 – $220
prescription glasses online
$1.18 – $1.49 1 – 3 8 – 10 $9 – $20